Pump valve



r R. w. MURRAY.

PUMP VALVE.

APPLICAHON FILED MAR- 10 W20.

1,427,837, Patented Sept. 5, 1922.

' 3% 0602. WMf/ziy Patented Sept. 5, 1922. f

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rnlvir VALVE.

Application filed March 10,,1920. Serial No. 36%;778.

To all whom it may concern Be it known that ROBERT W. MURRAY, a citizen of the United States, residing at New Lexington, in the county of Perry and State of Ohio, has invented certainnew and useful Improvements in Pump Valves, of which -.the following is a specification.

This invention relates to pumps and has particular reference to pumps ofthe type wherein the fluid conduits thereof are formed from wood in order to be capable of withstandingacids or alkaline solution in order that the pumps may be employed in handling such corrosive fluids that .can not be successfully carried for any appreciable length of time by metallic structures.

Specifically, the present invention constitutes an improvement on the. valve construction of such wooden pumps by providing. a valve structure of simple, durable for mation and one whereinthe position of the valve parts may be firmly maintained duroperation and yet readily removable for purposes of adjustment and repair.

Another object ofthe invention resides 1n improving the valve construction disclosed in my prior Patent No. 1224:,200 dated May -1, 1917 by amplifying its general formation and in providing means for preventing fluid seepage through the removable cover mem bers thereof.

ith these and other objects in view, as

will appear as thedescription proceeds, the invention accordingly consists in the novel features of vconstruction, combinations of elements and'arrangement of parts, hereinafter to be fully described and to have the scope thereof pointed out in theappended claim.

In the accompanying drawing, forming a part of this specification, and in, which simi lar characters of reference denote like and corresponding parts:

The figure is avertical longitudinal sec tional view taken through the pump Where in is embodied my improved valve construction. I

As stated, the body of the pump is formed of wood and consists essentially of a pair of verticallyarranged blocks land 2. These blocks are arranged so as to rest one on top of the other, and a gasket 3 is interposed between the adjacent surfaces of said blocks in order. to render the joint therebetween leak proof. Any suitable means may be provided for retaining the blocks in assembled relationship. The block 1 islongitudinally bored as at 4 to provide opposed piston chambers '5, in which wooden plungers may slidably operate, said chambers being separated by means of transverse filler blocks 6 which are positioned centrallyin such manner asto obstruct the borev 4:. Communicatingwith the chamberf5 at the innerends of the latter are vertically arranged bores 7 jwhdilcgi pass vertically through the blocks 1 Situated Within the lower portions of the ,bores 7 are tubular liners 8, whose lower edges rest upon the longitudinal liners 9 positioned within. the bores 45. The upper portions of the bores 7 within the'block 1 are arranged to receive wooden valve seats 10,

which latter are of annular formation and are so shaped as to be capableof being securely clamped between the meeting por- .tions Of tlieblocks land 2; These seats are prov ded with a plurality of vertically arranged openings 11 which are normally closedby means of flat disk valves 12 of rubber or other suitable material. Further, the bores 7 are provided with valve controlled ports 1.3.through which fluid may be drawn into the chambers 5. It will be understood that the plungers within said chambers operate in opposition to eachother so that upon the advance stroke of the piston on one side to expel fluid from the pump the plungeron the opposite side will be moved to draw a fluid into its chamber. This opposed arrangement 1s well known and provides for a double act ng pump and hence permits. of a continuous. outflow of fluid, After passlng through the openings 11 and around. the valves 12the discharge fluid will be directed into an intervening conduit 14:

located between the bores '7 and above the valves 12. Adischarge duct 15 leads from. a

the conduit 14 andpermits of a discharge vfluidfromthepu1np.- It will be manifest that virtue of this construction an entirely wooden pumpyis provided which will befree from the detrimental effects of fluids containing acids or the like, and hence the pump may beused in such particular capacities and under such conditions that metallic pumps similarly used would very soon fail and bficOmc inoperative by the corrosive action of the acids. The construction so far described is substantially the same as that set forth in my "aforesaid patent and therefore is not specifically claimed hereinafter.

The present invention deals particularly with an improved valve construction for pumps of the character specified, and aims to provide a structure which will be simple and positive in operation, will be readily removable and accessible and yet so con structed as to prevent an undue escape of fluid ofjoints definingthe valve structure. To this end, the valves 12 are provided with axial openings 16, which are arranged to slidably receive the reduced shank portions 17 of a pair of slidable valve stems 18. The body portions of the stems 18 are offset from the shank portions 17 in order to provide bearing surfaces 19, and springs 20 of any suitable type are arranged between these surfaces 19 and the corresponding upper surfaces of the valves 12, said springs serving in the capacity of cushions to retard the upward movement of the valves 12. The upper ends of the bores 7 are reduced and countersunk as at 21 to removably receive a plurality of head plates 22, which latter are formed with annularly offset rims 23 arranged to be received within the countersunk portions 21 and to thereby retain the head plates in supported relationship with respect to thebores 7.v The plates 22 are further formed to embody annular body portions 24, which are located normally within the upper reduced ends of the bores 7 These portions'24thave their under faces formed with axially located sockets 25 in which are mounted the reduced ends 26 of a pair of guide bushings 27. These bushings are, in turn equipped with vertical pockets 28 in which are slidably received the upper reduced ends of the stems 18. It will be noted that the pockets 28 are of sufficient depth to permit the valves 12 to close by gravity and also to be slidably opened when responding to fluid pressure created within the chambers 5, the springs 20 being pro vided to arrest undue upward movement on the part of the valves and to gradually check their upward movement. Upon re lease of the valvesfrom the fluid pressure, the same will gravitate to a closed position. The parts so far described with the possible exception of the springs 20 are formed from wood and hence are not open to the corrosive influence of the fluids which are designed to pass through the pump on their way to the outlet 15.

To effectively'seal the upper ends of the bores 7 and yet to render the valve construetion readily accessible, the upper surface of the block 2 is provided with a plurality of grooved metallic guides .29, which have their grooved faces located on opposite sides of the bores 7. Arranged to be reeaves? ceived within the grooves of the guides 29 is a pair of cap plates 30 which are adapted to be positioned in axial registration with the bores 7. These plates 30 are provided centrally with threaded openings 31 in which are adj ustablypositioned a plurality of set screws or their equivalents 32. The lower ends of these screws are adapted to frictionally engage with a pair of metallic wear plates 33 situated upon the upper surfaces of the head defined bythe valve structure will be eifectively prevented, and the operation of the pump thereby rendered reliable. To remove the valve parts, however, it is simply necessary to loosen one or both of the screws 32. This permits of the convenient removal of the cap plates 30, and with these removed it follows that the internal parts of the valve structure may be likewise taken out of the bores 7 and suitably adjusted or repaired. To prevent the wear plates 33 from losing their operative positions, the head plates 22 are provided with set screws or their equivalents 35, the heads of which are positioned within the sockets 25 and are maintained therein by the wedged bushings 27. This construction causes the shank ends of the screws 85 to project above the upper surfaces of the plates 22 so as to be received within small centering openings 36 provided in the under faces of the wear plates. This construction retains the plates in operative positions and prevents their slipping upon the application of pressure thereto.

It will thus be manifest from the foregoing description that the present invention provides an efficient, durable and readily removable valve structure for wooden um s and one wherein all arts are conbody having a fluid conducting bore formed therein, a. valve seat located in the bore, a disc valve engaged normally on the seat, a stem having a reduced shank for passage through the valve disc for sliding engagement with the seat, said stem having an an nular offset overhanging the valve disc, a

spring encircling the shank and engaged plate interposed between the first named With the oflset and valve disc, a plate en plate and cap plate, set screws carried by gaged With the body and having a bushing the cap plate and first named plate and en- 10 mounted therein, said bushing having a gaged, respectively, with the Wear plate.

pocket formed therein for slidably receiving In testimony whereof I afliX my signature.

the upper end of the valve stem, a cap plate removably mounted on the body, a Wear ROBERT W. MURRAY. 

